EPlus Emergency Charger for Mobile Devices Uses any available direct current source - 6V-12V batteries Charges devices as easily as everyday chargers Smart charger determines the maximum charging rate Self-contained case includes cables, adapters, 4-AA lithium batteries in holder, automotive adapter and alligator clips Perfect addition for household or business emergency kits Lithium batteries will not lose charge for 5 years Flexible solution allows the use of available batteries from household items, camping and hiking equipment - even a family member's electronic games Waterproof electronics Charges smartphones, tablets, iPods, iPhones Weighs just 13 oz AA (included) and D-cell (not-included) battery holders.